Saturday

January 31, 2015

January 31, 2015

Posted by **Adrianna** on Friday, February 1, 2013 at 12:26pm.

someone help please im so confused. i am trying to find the solution set?

- College Algebra -
**Reiny**, Friday, February 1, 2013 at 2:53pm3x^4 - 648x = 0

divide by 3

x^4 - 216x = 0

x(x^3 - 216)=0

x = 0 or x^3-216=0

if you want only real solutions

then from x^3=216

x = 6

however, if you want complex roots at well .....

x^3 - 216 = (x-6)(x^2 + 6x + 36) = 0

x= 6 , we already know that

or

x = (-6 ±√-108)/2

= (-6 ± 6i√3)/2

= -3 ± 3i√3

so x = 0 , 6 , -3±3i√3

**Answer this Question**

**Related Questions**

college algebra - Solve the following inequality. x^3+9x^2-108 less or equal to ...

algebra - Can someone help me with this please? I am trying to find the solution...

college algebra--please help - Find a bound on the real zeros of the polynomial ...

algebra - Can someone help me with this please? I am trying to find the solution...

College Algebra - Just so you guys know, I'm not trying to get the answers to ...

college algebra - A partial solution set is given for the polynomial equation. ...

Physics but algebra problem - Having issue with algebra. 89N=ma 99N=m2a would ...

college algebra - 1. find the equation of the line with the given properties. ...

College Algebra - Change 2x^2-5x=25 to standard form. Then find the solution set...

Algebra 1 - I'm having trouble solving x=2(x-1)+6 I understand but I get ...